Senior Full-stack Developer - Python/FastAPI & React/TypeScript

EPAM Systems; Poland; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Hybrid by design

Remote work within Poland

Work abroad up to 60 days annually

Relocation opportunities

Career development programs

English classes

Health insurance

Employee Stock Purchase Plan with 15%+

Office entertainment and relaxation

Referral bonuses

Job summary

EPAM Systems is building a new product in a multi-cloud setup and seeks a Senior Full-stack Developer to drive backend and frontend delivery. You will build with Python/FastAPI, React/TypeScript, PostgreSQL, OpenSearch, and heavy Databricks usage while optimizing performance.

You will create and maintain web applications, architect APIs, and deliver UI work end-to-end in a fast-moving startup environment with hybrid Poland-based work and occasional remote opportunities abroad.

Qualifications

• 5+ years delivering production systems with Python, FastAPI and SQL.
• Strong understanding of web app development, API architecture and integration patterns.
• Experience with high-load databases and performance optimization.
• Proficient in TypeScript and React, capable of end-to-end full-stack delivery.
• Hands-on use of GenAI engineering tools (Claude Code preferred).
• Clear communication with proactive ownership in a fast-moving startup.

Responsibilities

• Create and maintain web applications with Python/FastAPI and SQL.
• Architect APIs and integrations to support high-load database workloads.
• Improve query performance across production systems.
• Deliver UI work using TypeScript and React.
• Apply GenAI engineering tools to streamline developer workflows.
• Partner with teammates while owning and completing independent assignments.
• Share progress with stakeholders and the wider team.
• Drive feature ownership and add value beyond ticket-by-ticket execution.
• Deliver outcomes in a fast-paced startup environment despite ambiguity.

Skills

Python

FastAPI

SQL

TypeScript

React

GenAI tools

Claude Code

Communication

Ownership

Big data queries

Tools

PostgreSQL

OpenSearch

PySpark

SparkSQL

Databricks

Job description

We are creating a new product in a multi-cloud setup and are seeking a Senior Full-stack Developer to drive backend and frontend delivery. You will build with Python/FastAPI, React/TypeScript, PostgreSQL, OpenSearch, and heavy Databricks usage while optimizing performance.

Responsibilities

• Create and maintain web applications with Python/FastAPI and SQL
• Architect APIs and integrations to support high-load database workloads
• Improve query performance throughout production systems
• Deliver UI work using TypeScript and React
• Apply GenAI engineering tools to streamline and improve developer workflows
• Partner with teammates while owning and completing independent assignments
• Share progress proactively with stakeholders and the wider team
• Drive feature ownership and add value beyond ticket-by-ticket execution
• Deliver outcomes despite ambiguity in a fast-paced startup environment

Requirements

• Extensive experience of 5+ years delivering production systems with Python, FastAPI, and SQL
• Deep understanding of web app development, API architecture, and integration patterns
• Demonstrated ability to manage high-load databases and improve query performance
• Comfort with TypeScript and React plus willingness to work end-to-end full-stack
• Hands‑on use of GenAI engineering tools, ideally Claude Code
• Clear communication skills with a proactive, ownership-oriented approach
• Ability to handle uncertainty and execute without constant direction in a transparent, fast-moving startup environment
• English proficiency at B2 (Upper-Intermediate) level or higher

Nice to have

• Experience across TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
• Working knowledge of PostgreSQL and OpenSearch
• Exposure to cloud platforms, Infrastructure as Code, and supporting tools
• Experience handling data via PySpark and SparkSQL
• Client-facing experience

We offer

• We gather like-minded people:
  • Top tech minds driving innovation in AI, cloud and digital platform modernization
  • Supportive team and agile, startup-like culture
  • Hybrid by design mode and opportunity to work remotely within Poland
  • Chance to work abroad for up to 60 days annually
  • Business-driven relocation opportunities
• We provide growth opportunities:
  • Career development programs
  • Thought leadership, mentoring, soft skills and well-being programs
  • Certification (Anthropic, Gemini, GCP, Azure, AWS)
  • English classes
• We cover it all:
  • Stable pay
  • Participation in the Employee Stock Purchase Plan with a 15% discount
  • Benefits package (health insurance, multisport, shopping vouchers)
  • Referral bonuses up to $2,000
  • Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and more
  • Corporate, social and well-being events
• Please, note:
  • Benefits listed above are available to employees only
  • We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually
  • We will reach out to selected candidates exclusively

EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.